The effects of mixtures Ni–Ta and Ni–Zr powders combined with sintered solid solution TaB2 –NbC during spark-plasma sintering compositions at a pressing loading 60 MPa in the range 1200 – 1600°C on phase composition, percent content Ti, Ta, Zr sialon; microstructure; grain sizes crystalline phases; relative density; linear shrinkage; physical-mechanical properties; correlation elasticity modulu...

Porous geopolymer precursors were firstly prepared by the direct foaming method using bauxite, fly ash (FA), and metakaolin (MK) as raw materials, porous mullite ceramics after ammonium ion exchange then high-temperature sintering. The effects of chemical agent concentration, ion-exchange time, sintering temperature on geopolymer-derived studied, optimal preparation parameters found. Studies ha...

ncorporating Ni-laden waste sludge into kaolinite-based construction ceramic materials appears promising based on the identified nickel bearing hases, evaluated incorporation efficiency and nickel leachability of the products. Nickel aluminate spinel (NiAl2O4) results from sintering kaolinite nd nickel oxide between 990 and 1480 ◦C, with more than 90% incorporation efficiency achieved at 1250 ◦...